68954027729 has 2 divisors, whose sum is σ = 68954027730. Its totient is φ = 68954027728.

The previous prime is 68954027713. The next prime is 68954027767. The reversal of 68954027729 is 92772045986.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67732665025 + 1221362704 = 260255^2 + 34948^2 .

It is a cyclic number.

It is not a de Polignac number, because 68954027729 - 2⁴ = 68954027713 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68954027629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34477013864 + 34477013865.

It is an arithmetic number, because the mean of its divisors is an integer number (34477013865).

Almost surely, 2^68954027729 is an apocalyptic number.

It is an amenable number.

68954027729 is a deficient number, since it is larger than the sum of its proper divisors (1).

68954027729 is an equidigital number, since it uses as much as digits as its factorization.

68954027729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 68954027729 in words is "sixty-eight billion, nine hundred fifty-four million, twenty-seven thousand, seven hundred twenty-nine".